me 209 final
TRANSCRIPT
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ME 209GROUP DESIGN
GROUP 10
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DESIGN
REQUIREMENTPick a 5kg box of
30*30*30cm3 dimensions froma conveyor belt to a trolleywith a high difference of 0.5m
and angular change of 90o.
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Design in front viewed
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NOTATIONS
D1-piston rod diameter
D2-cylider inner diameter
D3-cylinder outer diameterD5-picking solid bar diameter
D6-pin diameter
D7-lifting solid bar diameter
D8-linkage pin diameter
T3-width of linkage bar(cross section)
T4-long of linkage bar(cross section)
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MATERIALSELECTION
Compound Factor of Safety Material
Picking cylinder 12 Cast iron
Pin 14 Steel
Steel rod 12 Steel
Spring 12 High carbon steel
Factor of safety and compound
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Strenthnesses of Materials
Ultimate tensileStrength/MPa
Ultimate ShearStrength/MPa
Density /kgm-3
Cast Steel 303 251.5 7650
Steel 760 456 7840
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Appearance Clear and Bright
Density 1027 kg/m3 @ 20oC
Color Light Amber
Hydraulic Break oil (E550)(Number 2006)
Spring
Modulus 78.6 kN/mm
2
Method of manufactureCold Drawing
Lower Cost SpringAverage Stress application
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Box and Hard rubber
(data calculations)
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Piston Rod Failure
Due to Shear FailureF1/ (D1
2/4) Ultimate Shear Stress/Factor of Safety
Due to Tensile FailureR1 / (D1
2/4) Ultimate Tensile Stress/Factor of Safety
D1 =20 mm
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Specimen Calculation
Total Liquid Volume = (/4)D22*Total length
Total Liquid mass = (/4)D22*Total length*
Cylinder Weight = (/4)(D42- D2
2)Total length*Total Weight = (Cylinder Weight) * (Liquid
mass)
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Cylinder Failure
Due to Tensile FailureW/(D4
2-D22)/4 Ultimate Tensile Stress/Factor of Safety
Due to Tensile FailureD4 - D3 = t
M / I = / R1 / (D2
2/4) Ultimate Tensile Stress/Factor of Safety
D3 =88 mm
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Solid cast iron rod Failure
Due to Tensile FailureR1 / (D5
2/4) Ultimate Tensile Stress/Factor of Safety
Due to Bending FailureM / I = / Wr / (D5
2/4) Ultimate Tensile Stress/Factor of Safety
D5 =60 mm
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Mode failure of lifting mechanismPin Failure
Due to Shear FailureW / (D6
2/4) Ultimate Shear Stress/Factor of Safety
Due to Compressive FailureW / (D7
2/4) Ultimate Tensile Stress/Factor of Safety
Pin is madefrom HarderMaterial
D6 = 5 mm
D7 = 5 mm
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Linkage Failure
Due to Compressive FailureW / t4 t3 Ultimate Compressive Stress/Factor of Safety
Instantaneous cantors
Fixed point
D2 =80 mm
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Piston Rod Failure
Due to Shear FailureW / (D8
2/4) Ultimate Shear Stress/Factor of Safety
Due to Bearing FailureW / (D8t4) Ultimate Shear Stress/Factor of Safety
D8 =4 mmT3 =6 mmT4 =6 mm
Fixed point
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High efficiency
Smooth Pick and Placecan do as we wish
Reliable
Some heavy weight
Initial cost is somemuch high
Advantages Disadvantages
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